UnrealEngineUWP/Engine/Source/Developer/AutomationDriver/Public/LocateBy.h

// Copyright 1998-2017 Epic Games, Inc. All Rights Reserved.
#pragma once

#include "CoreMinimal.h"
#include "Widgets/SWidget.h"

class IElementLocator;

DECLARE_DELEGATE_OneParam(FLocateSlateWidgetElementDelegate, TArray<TSharedRef<SWidget>>& /*OutWidgets*/);
DECLARE_DELEGATE_OneParam(FLocateSlateWidgetPathElementDelegate, TArray<FWidgetPath>& /*OutWidgetPaths*/);

/**
 * Represents a collection of fluent helper functions designed to make accessing and creating element locators easy
 */
class AUTOMATIONDRIVER_API By
{
public:

	/**
	 * Creates a new element locator that exposes the collection of SWidgets returned from the FLocateSlateWidgetElementDelegate
	 * as discovered elements
	 * @return a locator which uses the specified delegate to discover appropriate elements
	 */
	static TSharedRef<IElementLocator, ESPMode::ThreadSafe> Delegate(const FLocateSlateWidgetElementDelegate& Value);

	/**
	 * Creates a new element locator that exposes the collection of FWidgetPaths returned from the FLocateSlateWidgetElementDelegate
	 * as discovered elements
	 * @return a locator which uses the specified delegate to discover appropriate elements
	 */
	static TSharedRef<IElementLocator, ESPMode::ThreadSafe> Delegate(const FLocateSlateWidgetPathElementDelegate& Value);

	/**
	 * Creates a new element locator that exposes the collection of SWidgets returned from the lambda
	 * as discovered elements
	 * @return a locator which uses the specified lambda to discover appropriate elements
	 */
	static TSharedRef<IElementLocator, ESPMode::ThreadSafe> WidgetLambda(const TFunction<void(TArray<TSharedRef<SWidget>>&)>& Value);

	/**
	 * Creates a new element locator that exposes the collection of FWidgetPaths returned from the lambda
	 * as discovered elements
	 * @return a locator which uses the specified lambda to discover appropriate elements
	 */
	static TSharedRef<IElementLocator, ESPMode::ThreadSafe> WidgetPathLambda(const TFunction<void(TArray<FWidgetPath>&)>& Value);

	/**
	 * Creates a new element locator that limits it's discovered elements to ones with the specified Id
	 * @return a locator which uses the specified Id to discover appropriate elements
	 */
	static TSharedRef<IElementLocator, ESPMode::ThreadSafe> Id(const FString& Value);

	/**
	 * Creates a new element locator that limits it's discovered elements to ones with the specified Id
	 * @return a locator which uses the specified Id to discover appropriate elements
	 */
	static TSharedRef<IElementLocator, ESPMode::ThreadSafe> Id(const FName& Value);

	/**
	 * Creates a new element locator that limits it's discovered elements to ones with the specified Id
	 * @return a locator which uses the specified Id to discover appropriate elements
	 */
	static TSharedRef<IElementLocator, ESPMode::ThreadSafe> Id(const TCHAR* Value);

	/**
	 * Creates a new element locator that limits it's discovered elements to ones with the specified Id
	 * @return a locator which uses the specified Id to discover appropriate elements
	 */
	static TSharedRef<IElementLocator, ESPMode::ThreadSafe> Id(const char* Value);

	/**
	 * Creates a new element locator that limits it's discovered elements to ones matching the specified "path"
	 *
	 * Path Example: "#Suite//Piano/Key//<STextBlock>"
	 *
	 * Path Syntax:
	 *
	 * #Suite = # represents that the following text is an explicit Id, in the case of a SWidget it needs to be tagged with the driver Id metadata 
	 * Piano = plain text represents general tags, in the case of a SWidget it needs to have a Tag or TagMetadata with the appropriate plain text value
	 * <STextBlock> = <> represents types, in the case of a SWidget it should be the explicit type used in the SNew construction
	 *
	 * Hierarchy is represented by forward slashes
	 *
	 * / = a single forward slash represents that the next value must match a direct child of the element matched before it
	 * // = a double forward slash represents that the next value must match any descendant of the element matched before it
	 *
	 * Reference the AutomationDriver.spec.cpp expectations for additional examples of the syntax in use 
	 *
	 * @return a locator which uses the specified path to discover appropriate elements
	 */
	static TSharedRef<IElementLocator, ESPMode::ThreadSafe> Path(const FString& Value);
	
	/**
	 * Creates a new element locator that limits it's discovered elements to ones matching the specified "path"
	 *
	 * Path Example: "#Suite//Piano/Key//<STextBlock>"
	 *
	 * Path Syntax:
	 *
	 * #Suite = # represents that the following text is an explicit Id, in the case of a SWidget it needs to be tagged with the driver Id metadata 
	 * Piano = plain text represents general tags, in the case of a SWidget it needs to have a Tag or TagMetadata with the appropriate plain text value
	 * <STextBlock> = <> represents types, in the case of a SWidget it should be the explicit type used in the SNew construction
	 *
	 * Hierarchy is represented by forward slashes
	 *
	 * / = a single forward slash represents that the next value must match a direct child of the element matched before it
	 * // = a double forward slash represents that the next value must match any descendant of the element matched before it
	 *
	 * Reference the AutomationDriver.spec.cpp expectations for additional examples of the syntax in use 
	 *
	 * @return a locator which uses the specified path to discover appropriate elements
	 */
	static TSharedRef<IElementLocator, ESPMode::ThreadSafe> Path(const FName& Value);

	/**
	 * Creates a new element locator that limits it's discovered elements to ones matching the specified "path"
	 *
	 * Path Example: "#Suite//Piano/Key//<STextBlock>"
	 *
	 * Path Syntax:
	 *
	 * #Suite = # represents that the following text is an explicit Id, in the case of a SWidget it needs to be tagged with the driver Id metadata 
	 * Piano = plain text represents general tags, in the case of a SWidget it needs to have a Tag or TagMetadata with the appropriate plain text value
	 * <STextBlock> = <> represents types, in the case of a SWidget it should be the explicit type used in the SNew construction
	 *
	 * Hierarchy is represented by forward slashes
	 *
	 * / = a single forward slash represents that the next value must match a direct child of the element matched before it
	 * // = a double forward slash represents that the next value must match any descendant of the element matched before it
	 *
	 * Reference the AutomationDriver.spec.cpp expectations for additional examples of the syntax in use 
	 *
	 * @return a locator which uses the specified path to discover appropriate elements
	 */
	static TSharedRef<IElementLocator, ESPMode::ThreadSafe> Path(const TCHAR* Value);

	/**
	 * Creates a new element locator that limits it's discovered elements to ones matching the specified "path"
	 *
	 * Path Example: "#Suite//Piano/Key//<STextBlock>"
	 *
	 * Path Syntax:
	 *
	 * #Suite = # represents that the following text is an explicit Id, in the case of a SWidget it needs to be tagged with the driver Id metadata 
	 * Piano = plain text represents general tags, in the case of a SWidget it needs to have a Tag or TagMetadata with the appropriate plain text value
	 * <STextBlock> = <> represents types, in the case of a SWidget it should be the explicit type used in the SNew construction
	 *
	 * Hierarchy is represented by forward slashes
	 *
	 * / = a single forward slash represents that the next value must match a direct child of the element matched before it
	 * // = a double forward slash represents that the next value must match any descendant of the element matched before it
	 *
	 * Reference the AutomationDriver.spec.cpp expectations for additional examples of the syntax in use 
	 *
	 * @return a locator which uses the specified path to discover appropriate elements
	 */
	static TSharedRef<IElementLocator, ESPMode::ThreadSafe> Path(const char* Value);

	/**
	 * Creates a new element locator that limits it's discovered elements to the one under the cursors current position
	 * @return a locator which uses the cursor position to discover appropriate elements
	 */
	static TSharedRef<IElementLocator, ESPMode::ThreadSafe> Cursor();
};